/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <alloca.h> #include <fcntl.h> #include <inttypes.h> #include <time.h> #include <sys/time.h> #include <stdarg.h> #include <stdbool.h> #include <stdlib.h> #include <stdio.h> #include <signal.h> #include <sched.h> #include <limits.h> #include <sys/types.h> #include <sys/stat.h> #include <dirent.h> #include <sys/resource.h> #include <stddef.h> #include <unistd.h> #include <locale.h> #include <mntent.h> #include <sys/socket.h> #if SIZEOF_PID_T == 4 # define PID_FMT "%" PRIu32 #elif SIZEOF_PID_T == 2 # define PID_FMT "%" PRIu16 #else # error Unknown pid_t size #endif #if SIZEOF_UID_T == 4 # define UID_FMT "%" PRIu32 #elif SIZEOF_UID_T == 2 # define UID_FMT "%" PRIu16 #else # error Unknown uid_t size #endif #if SIZEOF_GID_T == 4 # define GID_FMT "%" PRIu32 #elif SIZEOF_GID_T == 2 # define GID_FMT "%" PRIu16 #else # error Unknown gid_t size #endif #if SIZEOF_TIME_T == 8 # define PRI_TIME PRIu64 #elif SIZEOF_TIME_T == 4 # define PRI_TIME PRIu32 #else # error Unknown time_t size #endif #if SIZEOF_RLIM_T == 8 # define RLIM_FMT "%" PRIu64 #elif SIZEOF_RLIM_T == 4 # define RLIM_FMT "%" PRIu32 #else # error Unknown rlim_t size #endif #include "macro.h" #include "missing.h" #include "time-util.h" /* What is interpreted as whitespace? */ #define WHITESPACE " \t\n\r" #define NEWLINE "\n\r" #define QUOTES "\"\'" #define COMMENTS "#;" #define GLOB_CHARS "*?[" /* What characters are special in the shell? */ /* must be escaped outside and inside double-quotes */ #define SHELL_NEED_ESCAPE "\"\\`$" /* can be escaped or double-quoted */ #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;" #define FORMAT_BYTES_MAX 8 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m" #define ANSI_RED_ON "\x1B[31m" #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m" #define ANSI_GREEN_ON "\x1B[32m" #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m" #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m" #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m" #define ANSI_HIGHLIGHT_OFF "\x1B[0m" #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K" size_t page_size(void); #define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) #define streq(a,b) (strcmp((a),(b)) == 0) #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0) #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0) #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0) bool streq_ptr(const char *a, const char *b) _pure_; #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n))) #define new0(t, n) ((t*) calloc((n), sizeof(t))) #define newa(t, n) ((t*) alloca(sizeof(t)*(n))) #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n))) #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n))) #define malloc0(n) (calloc((n), 1)) static inline const char* yes_no(bool b) { return b ? "yes" : "no"; } static inline const char* true_false(bool b) { return b ? "true" : "false"; } static inline const char* strempty(const char *s) { return s ? s : ""; } static inline const char* strnull(const char *s) { return s ? s : "(null)"; } static inline const char *strna(const char *s) { return s ? s : "n/a"; } static inline bool isempty(const char *p) { return !p || !p[0]; } static inline char *startswith(const char *s, const char *prefix) { size_t l; l = strlen(prefix); if (strncmp(s, prefix, l) == 0) return (char*) s + l; return NULL; } static inline char *startswith_no_case(const char *s, const char *prefix) { size_t l; l = strlen(prefix); if (strncasecmp(s, prefix, l) == 0) return (char*) s + l; return NULL; } char *endswith(const char *s, const char *postfix) _pure_; char *first_word(const char *s, const char *word) _pure_; int close_nointr(int fd); int safe_close(int fd); void safe_close_pair(int p[]); void close_many(const int fds[], unsigned n_fd); int parse_size(const char *t, off_t base, off_t *size); int parse_boolean(const char *v) _pure_; int parse_pid(const char *s, pid_t* ret_pid); int parse_uid(const char *s, uid_t* ret_uid); #define parse_gid(s, ret_uid) parse_uid(s, ret_uid) int safe_atou(const char *s, unsigned *ret_u); int safe_atoi(const char *s, int *ret_i); int safe_atollu(const char *s, unsigned long long *ret_u); int safe_atolli(const char *s, long long int *ret_i); int safe_atod(const char *s, double *ret_d); int safe_atou8(const char *s, uint8_t *ret); #if LONG_MAX == INT_MAX static inline int safe_atolu(const char *s, unsigned long *ret_u) { assert_cc(sizeof(unsigned long) == sizeof(unsigned)); return safe_atou(s, (unsigned*) ret_u); } static inline int safe_atoli(const char *s, long int *ret_u) { assert_cc(sizeof(long int) == sizeof(int)); return safe_atoi(s, (int*) ret_u); } #else static inline int safe_atolu(const char *s, unsigned long *ret_u) { assert_cc(sizeof(unsigned long) == sizeof(unsigned long long)); return safe_atollu(s, (unsigned long long*) ret_u); } static inline int safe_atoli(const char *s, long int *ret_u) { assert_cc(sizeof(long int) == sizeof(long long int)); return safe_atolli(s, (long long int*) ret_u); } #endif static inline int safe_atou32(const char *s, uint32_t *ret_u) { assert_cc(sizeof(uint32_t) == sizeof(unsigned)); return safe_atou(s, (unsigned*) ret_u); } static inline int safe_atoi32(const char *s, int32_t *ret_i) { assert_cc(sizeof(int32_t) == sizeof(int)); return safe_atoi(s, (int*) ret_i); } static inline int safe_atou64(const char *s, uint64_t *ret_u) { assert_cc(sizeof(uint64_t) == sizeof(unsigned long long)); return safe_atollu(s, (unsigned long long*) ret_u); } static inline int safe_atoi64(const char *s, int64_t *ret_i) { assert_cc(sizeof(int64_t) == sizeof(long long int)); return safe_atolli(s, (long long int*) ret_i); } const char* split(const char **state, size_t *l, const char *separator, bool quoted); #define FOREACH_WORD(word, length, s, state) \ _FOREACH_WORD(word, length, s, WHITESPACE, false, state) #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \ _FOREACH_WORD(word, length, s, separator, false, state) #define FOREACH_WORD_QUOTED(word, length, s, state) \ _FOREACH_WORD(word, length, s, WHITESPACE, true, state) #define _FOREACH_WORD(word, length, s, separator, quoted, state) \ for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted))) pid_t get_parent_of_pid(pid_t pid, pid_t *ppid); int get_starttime_of_pid(pid_t pid, unsigned long long *st); char *strappend(const char *s, const char *suffix); char *strnappend(const char *s, const char *suffix, size_t length); char *replace_env(const char *format, char **env); char **replace_env_argv(char **argv, char **env); int readlinkat_malloc(int fd, const char *p, char **ret); int readlink_malloc(const char *p, char **r); int readlink_and_make_absolute(const char *p, char **r); int readlink_and_canonicalize(const char *p, char **r); int reset_all_signal_handlers(void); int reset_signal_mask(void); char *strstrip(char *s); char *delete_chars(char *s, const char *bad); char *truncate_nl(char *s); char *file_in_same_dir(const char *path, const char *filename); int rmdir_parents(const char *path, const char *stop); int get_process_state(pid_t pid); int get_process_comm(pid_t pid, char **name); int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line); int get_process_exe(pid_t pid, char **name); int get_process_uid(pid_t pid, uid_t *uid); int get_process_gid(pid_t pid, gid_t *gid); int get_process_capeff(pid_t pid, char **capeff); char hexchar(int x) _const_; int unhexchar(char c) _const_; char octchar(int x) _const_; int unoctchar(char c) _const_; char decchar(int x) _const_; int undecchar(char c) _const_; char *cescape(const char *s); char *cunescape(const char *s); char *cunescape_length(const char *s, size_t length); char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix); char *xescape(const char *s, const char *bad); char *ascii_strlower(char *path); bool dirent_is_file(const struct dirent *de) _pure_; bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_; bool ignore_file(const char *filename) _pure_; bool chars_intersect(const char *a, const char *b) _pure_; int make_stdio(int fd); int make_null_stdio(void); int make_console_stdio(void); int dev_urandom(void *p, size_t n); void random_bytes(void *p, size_t n); static inline uint64_t random_u64(void) { uint64_t u; random_bytes(&u, sizeof(u)); return u; } static inline uint32_t random_u32(void) { uint32_t u; random_bytes(&u, sizeof(u)); return u; } /* For basic lookup tables with strictly enumerated entries */ #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \ scope const char *name##_to_string(type i) { \ if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \ return NULL; \ return name##_table[i]; \ } \ scope type name##_from_string(const char *s) { \ type i; \ if (!s) \ return (type) -1; \ for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \ if (name##_table[i] && \ streq(name##_table[i], s)) \ return i; \ return (type) -1; \ } \ struct __useless_struct_to_allow_trailing_semicolon__ #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,) #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static) /* For string conversions where numbers are also acceptable */ #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \ int name##_to_string_alloc(type i, char **str) { \ char *s; \ int r; \ if (i < 0 || i > max) \ return -ERANGE; \ if (i < (type) ELEMENTSOF(name##_table)) { \ s = strdup(name##_table[i]); \ if (!s) \ return log_oom(); \ } else { \ r = asprintf(&s, "%u", i); \ if (r < 0) \ return log_oom(); \ } \ *str = s; \ return 0; \ } \ type name##_from_string(const char *s) { \ type i; \ unsigned u = 0; \ assert(s); \ for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \ if (name##_table[i] && \ streq(name##_table[i], s)) \ return i; \ if (safe_atou(s, &u) >= 0 && u <= max) \ return (type) u; \ return (type) -1; \ } \ struct __useless_struct_to_allow_trailing_semicolon__ int fd_nonblock(int fd, bool nonblock); int fd_cloexec(int fd, bool cloexec); int close_all_fds(const int except[], unsigned n_except); bool fstype_is_network(const char *fstype); int chvt(int vt); int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl); int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4); int ask_string(char **ret, const char *text, ...) _printf_(2, 3); int reset_terminal_fd(int fd, bool switch_to_text); int reset_terminal(const char *name); int open_terminal(const char *name, int mode); int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout); int release_terminal(void); int flush_fd(int fd); int ignore_signals(int sig, ...); int default_signals(int sig, ...); int sigaction_many(const struct sigaction *sa, ...); int fopen_temporary(const char *path, FILE **_f, char **_temp_path); ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll); ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll); bool is_device_path(const char *path); int dir_is_empty(const char *path); char* dirname_malloc(const char *path); void rename_process(const char name[8]); void sigset_add_many(sigset_t *ss, ...); int sigprocmask_many(int how, ...); bool hostname_is_set(void); char* lookup_uid(uid_t uid); char* gethostname_malloc(void); char* getlogname_malloc(void); char* getusername_malloc(void); int getttyname_malloc(int fd, char **r); int getttyname_harder(int fd, char **r); int get_ctty_devnr(pid_t pid, dev_t *d); int get_ctty(pid_t, dev_t *_devnr, char **r); int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid); int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid); int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev); int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev); int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky); int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky); int pipe_eof(int fd); cpu_set_t* cpu_set_malloc(unsigned *ncpus); int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0); int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5); int fd_columns(int fd); unsigned columns(void); int fd_lines(int fd); unsigned lines(void); void columns_lines_cache_reset(int _unused_ signum); bool on_tty(void); static inline const char *ansi_highlight(void) { return on_tty() ? ANSI_HIGHLIGHT_ON : ""; } static inline const char *ansi_highlight_red(void) { return on_tty() ? ANSI_HIGHLIGHT_RED_ON : ""; } static inline const char *ansi_highlight_green(void) { return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : ""; } static inline const char *ansi_highlight_yellow(void) { return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : ""; } static inline const char *ansi_highlight_blue(void) { return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : ""; } static inline const char *ansi_highlight_off(void) { return on_tty() ? ANSI_HIGHLIGHT_OFF : ""; } int files_same(const char *filea, const char *fileb); int running_in_chroot(void); char *ellipsize(const char *s, size_t length, unsigned percent); /* bytes columns */ char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent); int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode); int touch(const char *path); char *unquote(const char *s, const char *quotes); char *normalize_env_assignment(const char *s); int wait_for_terminate(pid_t pid, siginfo_t *status); int wait_for_terminate_and_warn(const char *name, pid_t pid); noreturn void freeze(void); bool null_or_empty(struct stat *st) _pure_; int null_or_empty_path(const char *fn); int null_or_empty_fd(int fd); DIR *xopendirat(int dirfd, const char *name, int flags); char *fstab_node_to_udev_node(const char *p); char *resolve_dev_console(char **active); bool tty_is_vc(const char *tty); bool tty_is_vc_resolve(const char *tty); bool tty_is_console(const char *tty) _pure_; int vtnr_from_tty(const char *tty); const char *default_term_for_tty(const char *tty); void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]); int kill_and_sigcont(pid_t pid, int sig); bool nulstr_contains(const char*nulstr, const char *needle); bool plymouth_running(void); bool hostname_is_valid(const char *s) _pure_; char* hostname_cleanup(char *s, bool lowercase); bool machine_name_is_valid(const char *s) _pure_; char* strshorten(char *s, size_t l); int terminal_vhangup_fd(int fd); int terminal_vhangup(const char *name); int vt_disallocate(const char *name); int symlink_atomic(const char *from, const char *to); int mknod_atomic(const char *path, mode_t mode, dev_t dev); int mkfifo_atomic(const char *path, mode_t mode); int fchmod_umask(int fd, mode_t mode); bool display_is_local(const char *display) _pure_; int socket_from_display(const char *display, char **path); int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell); int get_group_creds(const char **groupname, gid_t *gid); int in_gid(gid_t gid); int in_group(const char *name); char* uid_to_name(uid_t uid); char* gid_to_name(gid_t gid); int glob_exists(const char *path); int glob_extend(char ***strv, const char *path); int dirent_ensure_type(DIR *d, struct dirent *de); int get_files_in_directory(const char *path, char ***list); char *strjoin(const char *x, ...) _sentinel_; bool is_main_thread(void); static inline bool _pure_ in_charset(const char *s, const char* charset) { assert(s); assert(charset); return s[strspn(s, charset)] == '\0'; } int block_get_whole_disk(dev_t d, dev_t *ret); int file_is_priv_sticky(const char *p); #define NULSTR_FOREACH(i, l) \ for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1) #define NULSTR_FOREACH_PAIR(i, j, l) \ for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i)) int ioprio_class_to_string_alloc(int i, char **s); int ioprio_class_from_string(const char *s); const char *sigchld_code_to_string(int i) _const_; int sigchld_code_from_string(const char *s) _pure_; int log_facility_unshifted_to_string_alloc(int i, char **s); int log_facility_unshifted_from_string(const char *s); int log_level_to_string_alloc(int i, char **s); int log_level_from_string(const char *s); int sched_policy_to_string_alloc(int i, char **s); int sched_policy_from_string(const char *s); const char *rlimit_to_string(int i) _const_; int rlimit_from_string(const char *s) _pure_; int ip_tos_to_string_alloc(int i, char **s); int ip_tos_from_string(const char *s); const char *signal_to_string(int i) _const_; int signal_from_string(const char *s) _pure_; int signal_from_string_try_harder(const char *s); extern int saved_argc; extern char **saved_argv; bool kexec_loaded(void); int prot_from_flags(int flags) _const_; char *format_bytes(char *buf, size_t l, off_t t); int fd_wait_for_event(int fd, int event, usec_t timeout); void* memdup(const void *p, size_t l) _alloc_(2); int is_kernel_thread(pid_t pid); int fd_inc_sndbuf(int fd, size_t n); int fd_inc_rcvbuf(int fd, size_t n); int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...); int setrlimit_closest(int resource, const struct rlimit *rlim); int getenv_for_pid(pid_t pid, const char *field, char **_value); bool is_valid_documentation_url(const char *url) _pure_; bool in_initrd(void); void warn_melody(void); int get_home_dir(char **ret); int get_shell(char **_ret); static inline void freep(void *p) { free(*(void**) p); } #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \ static inline void func##p(type *p) { \ if (*p) \ func(*p); \ } \ struct __useless_struct_to_allow_trailing_semicolon__ static inline void closep(int *fd) { safe_close(*fd); } static inline void umaskp(mode_t *u) { umask(*u); } static inline void close_pairp(int (*p)[2]) { safe_close_pair(*p); } DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose); DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose); DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir); DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent); #define _cleanup_free_ _cleanup_(freep) #define _cleanup_close_ _cleanup_(closep) #define _cleanup_umask_ _cleanup_(umaskp) #define _cleanup_globfree_ _cleanup_(globfree) #define _cleanup_fclose_ _cleanup_(fclosep) #define _cleanup_pclose_ _cleanup_(pclosep) #define _cleanup_closedir_ _cleanup_(closedirp) #define _cleanup_endmntent_ _cleanup_(endmntentp) #define _cleanup_close_pair_ _cleanup_(close_pairp) _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) { if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) return NULL; return malloc(a * b); } _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) { if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) return NULL; return realloc(p, a * b); } _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) { if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) return NULL; return memdup(p, a * b); } bool filename_is_safe(const char *p) _pure_; bool path_is_safe(const char *p) _pure_; bool string_is_safe(const char *p) _pure_; bool string_has_cc(const char *p, const char *ok) _pure_; /** * Check if a string contains any glob patterns. */ _pure_ static inline bool string_is_glob(const char *p) { return !!strpbrk(p, GLOB_CHARS); } void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, int (*compar) (const void *, const void *, void *), void *arg); bool is_locale_utf8(void); typedef enum DrawSpecialChar { DRAW_TREE_VERTICAL, DRAW_TREE_BRANCH, DRAW_TREE_RIGHT, DRAW_TREE_SPACE, DRAW_TRIANGULAR_BULLET, DRAW_BLACK_CIRCLE, DRAW_ARROW, DRAW_DASH, _DRAW_SPECIAL_CHAR_MAX } DrawSpecialChar; const char *draw_special_char(DrawSpecialChar ch); char *strreplace(const char *text, const char *old_string, const char *new_string); char *strip_tab_ansi(char **p, size_t *l); int on_ac_power(void); int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f); int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f); #define FOREACH_LINE(line, f, on_error) \ for (;;) \ if (!fgets(line, sizeof(line), f)) { \ if (ferror(f)) { \ on_error; \ } \ break; \ } else #define FOREACH_DIRENT(de, d, on_error) \ for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \ if (!de) { \ if (errno > 0) { \ on_error; \ } \ break; \ } else if (ignore_file((de)->d_name)) \ continue; \ else static inline void *mempset(void *s, int c, size_t n) { memset(s, c, n); return (uint8_t*)s + n; } char *hexmem(const void *p, size_t l); void *unhexmem(const char *p, size_t l); char *strextend(char **x, ...) _sentinel_; char *strrep(const char *s, unsigned n); void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size); void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size); #define GREEDY_REALLOC(array, allocated, need) \ greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0])) #define GREEDY_REALLOC0(array, allocated, need) \ greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0])) static inline void _reset_errno_(int *saved_errno) { errno = *saved_errno; } #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno struct _umask_struct_ { mode_t mask; bool quit; }; static inline void _reset_umask_(struct _umask_struct_ *s) { umask(s->mask); }; #define RUN_WITH_UMASK(mask) \ for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \ !_saved_umask_.quit ; \ _saved_umask_.quit = true) static inline unsigned u64log2(uint64_t n) { #if __SIZEOF_LONG_LONG__ == 8 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0; #else #error "Wut?" #endif } static inline unsigned u32ctz(uint32_t n) { #if __SIZEOF_INT__ == 4 return __builtin_ctz(n); #else #error "Wut?" #endif } static inline int log2i(int x) { assert(x > 0); return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1; } static inline bool logind_running(void) { return access("/run/systemd/seats/", F_OK) >= 0; } #define DECIMAL_STR_WIDTH(x) \ ({ \ typeof(x) _x_ = (x); \ unsigned ans = 1; \ while (_x_ /= 10) \ ans++; \ ans; \ }) int unlink_noerrno(const char *path); #define alloca0(n) \ ({ \ char *_new_; \ size_t _len_ = n; \ _new_ = alloca(_len_); \ (void *) memset(_new_, 0, _len_); \ }) #define alloca_align(size, align) \ ({ \ void *_ptr_; \ size_t _mask_ = (align) - 1; \ _ptr_ = alloca((size) + _mask_); \ (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \ }) #define alloca0_align(size, align) \ ({ \ void *_new_; \ size_t _size_ = (size); \ _new_ = alloca_align(_size_, (align)); \ (void*)memset(_new_, 0, _size_); \ }) #define strappenda(a, ...) \ ({ \ int _len = strlen(a); \ unsigned _i; \ char *_d_, *_p_; \ const char *_appendees_[] = { __VA_ARGS__ }; \ for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \ _len += strlen(_appendees_[_i]); \ _d_ = alloca(_len + 1); \ _p_ = stpcpy(_d_, a); \ for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \ _p_ = stpcpy(_p_, _appendees_[_i]); \ _d_; \ }) #define procfs_file_alloca(pid, field) \ ({ \ pid_t _pid_ = (pid); \ const char *_r_; \ if (_pid_ == 0) { \ _r_ = ("/proc/self/" field); \ } else { \ _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \ sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \ } \ _r_; \ }) struct _locale_struct_ { locale_t saved_locale; locale_t new_locale; bool quit; }; static inline void _reset_locale_(struct _locale_struct_ *s) { PROTECT_ERRNO; if (s->saved_locale != (locale_t) 0) uselocale(s->saved_locale); if (s->new_locale != (locale_t) 0) freelocale(s->new_locale); } #define RUN_WITH_LOCALE(mask, loc) \ for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \ ({ \ if (!_saved_locale_.quit) { \ PROTECT_ERRNO; \ _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \ if (_saved_locale_.new_locale != (locale_t) 0) \ _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \ } \ !_saved_locale_.quit; }) ; \ _saved_locale_.quit = true) bool id128_is_valid(const char *s) _pure_; int split_pair(const char *s, const char *sep, char **l, char **r); int shall_restore_state(void); /** * Normal qsort requires base to be nonnull. Here were require * that only if nmemb > 0. */ static inline void qsort_safe(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *)) { if (nmemb) { assert(base); qsort(base, nmemb, size, compar); } } int proc_cmdline(char **ret); int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value)); int container_get_leader(const char *machine, pid_t *pid); int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd); int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd); bool pid_is_alive(pid_t pid); bool pid_is_unwaited(pid_t pid); int getpeercred(int fd, struct ucred *ucred); int getpeersec(int fd, char **ret); int writev_safe(int fd, const struct iovec *w, int j); int mkostemp_safe(char *pattern, int flags); int open_tmpfile(const char *path, int flags); int fd_warn_permissions(const char *path, int fd); unsigned long personality_from_string(const char *p); const char *personality_to_string(unsigned long); uint64_t physical_memory(void); char* mount_test_option(const char *haystack, const char *needle); void hexdump(FILE *f, const void *p, size_t s); union file_handle_union { struct file_handle handle; char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ]; }; int update_reboot_param_file(const char *param); int umount_recursive(const char *target, int flags); int bind_remount_recursive(const char *prefix, bool ro); int fflush_and_check(FILE *f); char *tempfn_xxxxxx(const char *p); char *tempfn_random(const char *p); bool is_localhost(const char *hostname); int take_password_lock(const char *root); int is_symlink(const char *path); int is_dir(const char *path, bool follow); int unquote_first_word(const char **p, char **ret); int unquote_many_words(const char **p, ...) _sentinel_; int free_and_strdup(char **p, const char *s); int sethostname_idempotent(const char *s);